Electric lamp.



F. G. KEYES.

ELECTRIC LAMPv APPLICATION FlLEDJUNE26.1914-.

1 270,843. Patented July 2, 191B.

INVENTUI? er U 4444 ATTORNEY UNITED STATES PATENT UFFICE.

FREDERICK G. REYES, OF EAST ORANGE, NEW JERSEY. ASSIGNOR TO COOPERHEWITT ELECTRIC COMPANY, OF HOBOKEN, NEW JERSEY, A CORPORATION OF NEWJERSEY.

ELECTRIC LAMP.

Spcciflca tion of Letters Patent.

Patented July 2, 1918.

To o whom it may concern:

Be it known that I FREDERHK G. Knrns, a citizen of the United States,and residenlg of East Orange, county of Essex, State 0 New Jersey, haveinvented certain new and useful Improvements in Electric Lamps, 01 Whichthe following is a specification.

An in'iportant feature of the heavy tungsten filament lamp made known byme, for example, in my application No. 811,002, lji led January 8th,1914, is that of :uloquately sup porting the filament and at the sametime furnishing a convenient means for making connections inside thelamp. The (llsl; which I have employed is generally of aluminum and theanchor rods for the tungsten Wire are supported by but insulated fromthis disk.

These and other details of my invention are clearly shown in theaccompanying i'lrawings in which Figure 1 is a vertical sec tion of oneof my electrodes, a portion of which is shown in full lines; Figv I2 isa detail. of a connection to the filament terminals; Fig. 3 is a sideview of the aluminum disk and Fig. 4 is a plan of the suspendedfilament.

l i here filaments of the nature herein do scribed are used, it isbetter not to attempt to maintain the filaments in more straight linesor regular curves. It is lilrefcrahlo to allow a certain amount ofsagging, and support the filaments in such a "WHY as to provide for sucha sagging, at the samo time guarding against the touching and conse'quent short oircuiting of adjacent parts of the filament.

In the present instance the filament shown at 1 falls into what I maycall 2 basket shape or bowl shape. The filament is contained Within aglobe, 2, and is wound spirally from end to end but allowed to sag asalready described. At its ends the lilamcnt is attached to lead wires,3, 3, say of iron tipped with tungstein and the conuection is made witheach terminal by making the lower end, 4- of the lead bulb-shaped andwinding around it a portion of the eX- posed end of the tungsten spiraland then applying an oxy-acetylone flame adding, it necessary, a smallamount of iron as shown at 5. Since iron welds to tungsten very read ilya secure electrical connection is made.

The globe 2 is provided with a reduced tubular extension, 6. Near Wherethe extenion begins a disk, 7, of aluminum is placed being itselfsupported intermodiatoly from a rci ntrant portion, 8, of the chamberforlnei'l by the outer end of the extension. To such reintrant portionis attached an arbor, 9, of the same material as the wall of thecontainer or its eXl'mlslon and usually integral theriiewith. T he arboris provided with an upset portion. U), While the disk has a sleeve 11,with a split expanded por tion, 12, the latter being adapted to (overand cngag: the upset portion of the arbor. The dish with its sleeve maylie passed over the arbor and the engagement of the ex panded portion ofthe sleeve with the upset portion of the arbor having taken place thehole may be firmly fitod in position by means of a wire, 13, securelytwisted around the fingers of the split expanded portion.

the end of the ill'lJOh has attached to it in any suitable inauueranchor wires, 14, H, which extend into such a position below thetungsten filament 1 that loops made in [he ends of the wires may engageand hold up dill'erent portions of the tungsten filament withoutrequiring that the filament should he maintained rigidly in a straightor continuously curved line. The anchor Wires may be mainly nickel steelrods proiiilod with tip portions, 15x 15, of tong slrn or otherrefractory metal. in ,the form of wire Besides the rods 14, 14, which,having been se ured to the end of the arbor 9 are naturally insi'ulatedfrom ear-h other, there are anchor Wires, 16, .16, which have the samegeneral construction as the anchor Wires 14, 1%, which extend upwardthrough insulating blocks 17, 17, in the disk 7. In a similar way thelead rods, or Wires, 3, 3, are insulated from each other and from thedisk 7 by means of insulating sleeves in the disk 7. Above the disk 7the leads 3, 3 are secured, by silv'er soldering or by any approvedmcthml'which insures electrical connection, to leadingdn conductors, 18,18, passing through and forming a part of the 19, 19, of the lamp. Thedetails of those seals form no part of the present invention and neednot be further described. The sleeves may be connected to the externalcircuit by means of wires, 20, 20 and soldered to the ends of thesleeves.

I claim as my invention:

1. In a tungsten filament limp, a contrainer, :1 heavy filament therein,an extensupporting means a. nonconducting depending arbor centre 1ydisposed within the extenslon, anchor wires for conneotion withdifferent parts of the filament and an insulated metal disk and sleevesurrounding the said arbor.

2. In a. tungsten filament lamp, a conta-iner, a. heavy filamenttherein, an exten sion of the container and supporting means for thesaid filament compnsm a noncondueting depending arbor centre y disposedwithin the extension, anchor Wires for corn nection with diflt'erentparts of the filament and an insulated metal disk and sleeve surroundingthe said arbor, the terminals of the filament being connected to the lamseals b insulated rods extending throng the disli:

3. In a tungsten filament lamp, :1 con teiner, a, heavy filament thereiman extension oi the oontainer and supporting means for the said filamentcomprising a nonconducn 111g depending arbor centrally disposed Withinthe extension, the said erbor having y n upset portion, and an insulatedsupporting metal disk carrying a sleeve adapted to engage said upsetportion.

4. Supporting means for heavy tungsten filaments comprisinganon-conducting arbor 3 having an upset portion, an insulated supportingdisk carrying a sleeve adapted to engage the said upset portion andmeans for binding the 11 per end of the sleeve to the arbor above t eupset portion. 3

Signed at New York, in the count of New York and State of New York this25 day of June, A. D. 1914. v

FREDERICK G. KEYES.

Witnesses:

Tues. H. BROWN, H. B. WOODWABD.

